Riveting machine



July 14, 1931. .F. H. ROHR ,8

RIVETfNG MACHINE Fi ledJime e, 1929 2 Sheets-Sheet 1.

IN V EN TOR.

mozzeramfifaze ATTORNEY Patented July 14, 1931 UNITE-D STATES- "PATENT OFFIeE FREDERICK H. ROHR, OF SAN DIEGO, CALIFORNIA, ASSIGNOR TO SOLAR AIRCRAFT 'OOM-P ANY, OF SAN DIEGO, CALIFORNIA, A CORPORATION OF DELAWARE arvarme macnmn Application filed June 6,

,1 My invention relate o riveting machines, and. the objects of my invention are: first, to provide a machine of this class which presses against rather than strikes the rivets, thereby reducing the danger of crystallization; second, to provide a rnachine of this class which, operating by pressure rather than impact causes the shank of'the rivet to swell into and completely fill the hole through which it extends and enables the extended end: of the shank to form a smooth head of any desired shape, thus the rivet is caused to firmly and tightly grip the work between its head; third, to provide a clamp means cooperating with the riveting means which holds the work firmlyin place during the riveting operation; fourth, to provide a machine of this class which operates by fluid pressure; fifth, to provide a riveting machine which although capable of delivering the great pressure needed to press a rivet into shape is extremely compact, and which may be readily made-in a portable form, if desired; sixth, to provide a rivetin machine in which the riveting plunger an die may be readily removed forreplacement or the like; seventh, to provide a riveting machine in which the vise or work clamping means may be readily disconnected or removed if desired to use the riveting mechanism alone; .eighth, to providefa rivetin "machine in which only one movement 0 the riveting plunger is necessary in order to perform the riveting operation; ninth, to provide a riveting machine which is practically silent in operation; tenth, to .provide a riveting machine in which the force upon the riveting various shapes so I unusual places, and twelfth, to provide a;

\ of construction proportional plunger is automatically released if the plungpr moves further than it is necessary for "t a riveting operation, thus should the device be operated without work'between the plunger and die','the plunger will-not engage the die with] suificient force to' do harm; eleventh, to provide riveting machine which may be readily constructed in as to rivet in awkward or riveting machine which is extremely sin'iple to its functions, durable, efiicient in its action, and which will jrivetnig plunger spring 6,

1929. Serial No. 368,975.

appended claims, reference being had to the accompanying drawings andto the characters of reference thereon which "form a part of this application, in which:

Figure 1 is a longitudinal sectional viewof my riveting machine taken through 11 of Fig. 5, with parts and portions shown in elevation to facilitate the illustration; Fi 2 is a transverse sectional view thereofta en" through 2-2 of Fig. 1, with parts and portions shown in elevation to facilitate the illustration; Fig. 3 is another longitudinal sectionalview through 3-3 of Fig. 5, with parts and portions shown in elevation to facilitate the illustration; Fig. 4 is a sec-*1 tional viewthrough 4-4 of Fig. 1', with parts and portions shown in elevation to facilitate the illu'stration; Fig. 5 is a sectional view through 5-5 of Fig. -1, with parts and ,por-' tions shown in .elevation to facilitate the illustration; Fig. 6 is a I view through 6-6 of Fig. 1, with r portions shown in'elevatlon to faci itate the illustration; and Fig. 7 is a plan view of the plunger operating lever with one of the V156 operating levers shown in relation thereto. 7

Similar characters of reference refer to similar parts and portions throughout ,the several views of the drawings.

Casing l riveting die member 2, stationary vise jaws 3, bushing 4, rivetmg plunger 5, bushing .7, vise 8, movable vise-jaws 9, cap members 10, compensating springs 11, collars '12, springs- 13, riveting lever 14, vise levers 15, sleeve-members 16, shaft member 17 riveting plunger engaging roller 13, shank cap engaging rollers 19, riveting lever cam roller 20, vise lever cam rollers 21, cam member 22, earn ide rollers 23, cam guide shank members roller pins 24,cylmder member 25, piston 26,

transverse'secti onal arts and principal parts and portions of my riveting machine.

The casing 1 comprises a base portion joined to an a ron portion 1?; which extends downwardly rom the forward side of said base portion. The apron portion 16 supports a bracket portion 10 which extends upwardly and outwardly on the opposite side of the apron from the base portion 1a. The upper surface of the bracket portion 10 is provided with a channel 1d which extends transversely to the riveting machine.

The sides of the channel 1d are out under so as to dovetail with the lower portion of a die member 2 and the similar lower portions of two stationary vise jaws 3 one positioned on each side of the die member 2, as shown best in Fig. 5. The vise jaws 3 and die member 2 play be removed by sliding them sideways out the end of the channel 1d.

The casing 1 is provided with a forward wall 1e which extends upwardly at the forward side of the base member 1a. forming a continuation of the apron 1b. The forward wall 16 curves forwardly at its up er portion and forms a head portion 1;. e head portion 1; isin vertical alinement with the bracket 10, as shown best in Figs. 1 and 5. The head portion is provided with an opening 1g therethrough which is centered relative to the head portion 1 and in alinement with the die member 2, as shown best in Figs. 1 and 5. The opening 19 is constricted at its lower portion and receives a bushing 4.

Slidably mounted in the bushing 4 is a riveting plunger 5, the lower end of which is shapedin a manner suitable for forming a rivet head. The upper end of the riveting plunger 5 is enlarged so as to form a sliding joint with the-side walls of the opening 19. Between the head or enlarged portion 5a of the riveting plunger and the bushing 4 is positioned a spring 6 which tends to hold the plunger out of engagement with its die 2. The head portion 1/ is provided with two other openings 1h therethrough, one on each side of the opening 1g, and in parallel spaced relation thereto. The bottom portion of each opening 171. is constricted and receives a bushing 7.

Slidably mounted in each bushing 7 is a vise shank member 8. Removably secured to the lower end of eachvise shank member 8 is a movable vise jaw 9, whichhas a substantially flat lower side adapted to register with the stationary vise jaws 3. The movable vise jaws 9 extend as close as possible to the riveting plunger 5, as shown best in Fig. 5. i

The upper end of each vise shank member 8 terminates in a head portion 8a over which fits the sleeve portion 10a of a cap member 10.' The. sleeve'portion 10a of the cap member 10 forms a snug sliding fit with its opening 1h. Positioned between the head of; each vise shank member 8 and the closed end of its cap 10 is a compensating spring 11. Each spring 11 is relatively strong and adapted to permit slight relative movement of the cap and vise shank member 8. A. collar 12 fits on the under side of eac vise shank head 8a and a spring 13 is positioned between each collar 12 and the corresponding bushing 7. These sprin s 13 are adapted to hold the movable jaw o the vise out of engagement with the stationary jaw. The riveting plunger 5 is operated by a riveting lever 14; while the vise shank members 8 are operated by vise levers 15. One vise lever 15 is mounted on each side of the riveting lever 14. Bearing brackets 19' extend rearwardly from the head portion 1f on either side of the vise lever 15. The base member is provided with side walls 170 which extend upwardly therefrom until flush with the upper side of the head member 1;. Bearing brackets 1m are formed in the. side portions 1k in alinement with the bearing brackets 17'.

A sleeve or hearing member 16 extends from each bearing bracket 1;) to its nearest adjacent bearing bracket 1m and forms the pivoting axis for the vise levers 15, as shown best in Fig. 6. A shaft member 17 extends through the sleeve members 16 and supports the riveting lever 14 between the bearing brackets lj, as shown in Figs. 1 and 6.

The riveting lever 14 curves upwardly and forwardly from its pivoted portion and terminates in a forked end 14a positioned above the riveting plunger, as shown best in Figs.

'1 and 5. Rotatably mounted in the forked extends rearwardly and downwardly into the r chamber formed by the base 1a, front wall 16, the side walls 170 and a rear wall 11), extending upwardly from the rear side of the casing member 1. This rearwardly extending arm 14c of the riveting lever '14 terminates in a bifurcated portion 14d between the members of which a roller 20 is journal led by means of a pin 14c. wardly and downwardly extending arm 150 Similarly the rearof each vise l ver 15 terminates in a bifurcated portion 1503 between the members of which a roller is journalled by means of a pin 15e, as shown best in Fig. 3.

The rollers 20 and 21 are adapted to enga to rest on a plurality of guide rollers 23 which are supported transversely to the cam between the side walls 170 of the casing on roller pins 24, as shown in Figs. 1, 3, 4 and 6.

Bosseslp extend inwardly from the side walls 170 of-the'casing 1 and engage the side margins of the cam so as to hold .it "in :al'inement with the rollers and 21. The rollers 21 of the vise operating levers .15 engage the outer side margins of the cam, designated 22a, while the rollers 20 connected with the.

riveting lever 14 engage the central portion of the cam, designated 22?). The cam 22 is adapted to raise the arms 14c and 15a of the levers 14 and 15 by wedging between the guide rollers 23 and cam rollers 20 and 21, thereby causing the other arms of the levers 14 and 15 to depress the riveting plunger 5 or movable vise jaws 9, as the case may be.

Supported by the rear wall 112. of the casing 1 and extending rearwardly therefrom is a cylinder member 25 of annular cross section.

' The head of thecylinder is closed except for a small opening connected with a source of compressed air supply, or other fluid, not shown. Slidablymounted in the cylinder member 25 is a piston 26. The skirt 26a of the piston is provided with inwardly extending boss portions 26?) which are hollow and receive a pin 27 adapted to support the end portion of the cam 22. The piston is provided with suitable sealing means 28, such as a cup leather. A spring'29 extends between 'the piston 26 and the secured end of the cylinder 25, as shown in Figs. 1 and 3, so as to cause, the piston to return to the head of the cylinder when the air pressure is released.

The upper end of-the casing or housing 1 is open but may have a hinged lid 30 to conceal the working parts and at-the same time to permit ready access to the mechanism.

The shaft member 17 supporting the lever 14 has a relatively loose sliding fit in the sleeve members 16 so that the riveting op crating lever 14 may be readily removed. As soon as the riveting lever 14 is removed the riveting plunger. 5 may be easily taken out of the its casing and a new one inserted, if desired.

If desired, the sleeves 16may have a loose sliding fit with their journals sothat they may be readily removed in order that the vise operating levers 15 may be taken out, thus rendering the vise inoperative or enabling the shank and other portions of the vise mechanism to be removed, thus enabling the rivet ing portion ofthe machine to operate without the aid of the vise'mechanism.

The operation of my riveting machine is as followsizltiis preferred to bring the vise portions of my :r1veting machine into operation before the -riveting portions thereof.- This is cam portions 22a are held in yieldable engagement with the rollers 21 by means of the spring 29 extending between the-piston 26 and the head of the cylinder 25. The rollers 21 as before stated, are connected through their respective levers 15 to the vise jaws 9,- as shown best in Fig. 3. The cam portions 22a curve upwardly rather abruptly from its forward end so that only slight movement of the piston is necessary to brin the vise jaws into contact with the work. T e cam portion 22b is flat for a considerable distance before turning up forming a shelf portion 220.. This shelfportion is opposite the rising portion of the cam 22a and does not merge into the rising portion of the cam 22?; until almost opposite the major portionsof the cam 2241, as shown best in Figs. 1 and 3. The arm 140 being somewhat longer than the arms 150 is supported by its roller 20 upon the shelf 220 when the rollers 21 are in engagement with the ends of the cam. Air under pressure delivered into the space between the head of the cylinder and the head of the piston causes the cam to move forward,'raising the levers 15 and causing the movable vise aw to-come in contact with the upper side of the work and clamp the work between said movable jaws and the stationary jaws of the vise. The compensating spring 11 absorbs whatever excess movement there is in the levers 15, thus preventin the device from locking and enable the vise jaws tohold either thick or thin '0 erating lever 14 to rise upon the cam port1on 22b and depress the plunger 5. It is preferred to have the cam'portion 22b curve i rather abruptly at the point where it merges into the shelf 220 so that the first movement of theplunger is rather rapid. The slope of the. cam 22b gradually decreases after its first more abrupt portion so that theplunger slows down as it comes in contact with the end of the rivet until when it has reached the point where force is needed to mash and reform the rivet the cam surface 22?) is relatively flat and a considerable movement of the piston 26 is necessary in order to accomplish-the slight movement of'the plunger 5 necessary. Thus a tremendous amount offorce can be applied to the end of therivetso asoto'cause it to tends and spread out at its extended end so as to form second rivet head which firmly clamps the work between the previously formed head of the rivet. v

By varying the shape of the cams 22a and 22 it is possible to have just the pressure and movement necessary to suit the particular kind of riveting done by the machine.

The sprin 29 returns the piston to the head of its cylin er when the air pressure is released.

It is obvious that by substituting other tools or mechanism in place of the die member 2,

. stationary vise jaws 3, the plunger 5, vise shank members 8, and variable vise jaws 9, the machine may be used to shear, stamp, punch or perform other work.

In order tolimit the downward movement of the riveting plunger 5 so that it will not strike the die member 2 when the workis between them, ports a may be provided in the side walls of the cylinder 25 at the proper place to by-path the air just before the plunger strikes the die member, thus releasing the force behind the plunger, preventing injury to either the plunger or die member.

Though I have shown and described a particular construction, combination and. ar-

ragement of parts and portions, I do not wish to be limited to this particular construction, combination and arrangement, but desire to include in the scope of my invention the construction, combination and arrange ment substantially as set forth in the appendedclaims.

Having thus described my invention, wha I claim as new and desire to secure by Let ters Patent is:

1. In a riveting machine, a casing, a riveting plunger, a riveting die, lever means engageable with; said plunger, and cam means engageable with said lever, a cylinder-com nected with the saidcasing and receiving an end of said cam means, a fluid actuated piston therein connected to said cam means, said piston adapted to force a portion of saidcam means into engagement with said lever, independent-1y operable vise means mounted adjacent to said plunger for holding the work acted upon by said plunger and vise operating lever means for actuating said vise means, said vise lever means engageable by another portion of said cam.

2.. In a riveting machine, a cylinder, a piston slidably mounted therein, a sliding cam connected with the said piston, a lever engageable by said cam, a riveting plunger en gageable by. said lever, independently oper-- able vise means having fixed and movable jaws mounted adjacent to said structure for holding, the work acted upon by said riveting plunger, andvise operating lever means for actuating the movable jaws of said vice structure, and vise operating lever means for actuating said vise means, said vise lever means engageable by said cam.

4. In a riveting machine, a cylinder, a piston slidably mounted therein, a sliding cam connecte with the said piston, a lever engageable by said cam, ariveting plunger engageable by said lever, other cam means connected with said piston, other lever means engageable with said other cam means, a vise means, movable jaws therefor actuated by said other lever means, and located adjacent to said riveting plunger so as to hold the 'work acted upon by said plunger. 5. In a riveting machine, a cylinder, a p1ston slidably mounted therein, a sliding cam connected with the said piston, a lever engageable by said cam, a riveting plunger engageable by said lever, other cam means connected with said piston, other lever means engageable with said other cam means, a-vise means and movable jaws therefor actuated by said other lever means,and located adjacent to *said riveting plunger so as to hold the work acted upon by said plunger, said other cam means shaped so as to bring said vise means into action before said first cam brings said riveting structure into action.

6. In a riveting machine, a cylinder, a piston slidably mounted therein, a sliding cam connected with'the said piston, a lever engageable by said cam, a riveting plunger engageable by said lever, other cam means connected with said piston, other lever means engageable with said other cam means, a vise means, movable jaws therefor actuated by said other lever means, and located adjacent to said riveting plunger so as to hold the work acted upon by said plunger, said other cam means shaped so as to bring said vice means into action before said first cam brings said riveting structure into action, and resilient means associated with said movable vise jaws for taking up the extra movement of said other cam after said vise has engaged in the work.

liar

' 7. In a riveting machine, a cylinder, a piser connected with another portion of said adapted to ride on said guide means,

lever, said cam adapted to wedge between said lever and guide means, and cause movement of said lever, other sli ing cam means other lever means having one portion thereof adjacent to said guide means, a vise means for holding work to be acted upon by said riveting plunger, and movable jaws therefor engageable with said other lever means, said other sliding cam means adapted to wedge between said guide means and said other lever means and cause movement of said other lever means, so as to actuate said movable vise jaws,

8. In a riveting machine, a cylinder, a piston slidably mounted therein, a cam connected with the said piston, guide means for said cam, a lever, one portion thereof adjacent to said guide means, a riveting plunger connected with another portion of said lever, said cam adapted to wedge between said lever and guide means, and cause movement of said lever, other sliding cam means adapt ed to ride on said guide means, other lever means having one portion adjacent to said guide means, a vise means for holding work to be acted upon by said riveting plunger, and movable jaws therefor engageable with said other lever means, said other sliding cam means adapted to wedge between said guide means and said other lever means and cause movement of said other lever means, so as to actuate said movable vise jaws, sai vise jaw actuating means comprising said vise, cam and lever means constructed so as to bring said vise means into action before said riveting plunger is brought into action. 9. In a riveting machine, a cylinder, a piston slidably mounted therein, a cam connected with the said piston, guide means for said cam, a lever, one portion thereof adjacent to said guide means, a riveting plunger connected with another portion of said lever, said cam adapted to wedge between said lev 'er and guide means, and cause movement 0 said lever, other sliding cam means adapted to ride on said guide means, other lever means having one portion adjacent to said guide means, a vise means for holding work to be'acted upon by said riveting plunger, and movable jaws therefor engageable with said other lever means, said other sliding cam means adapted to wedge between said guide means and said other lever means, and cause movement of said other lever means, so as to actuate said movable vise jaws, said vise jaw actuating means comprising said vise, cam and lever means constructed so as to bring said visemeans into action before said riveting plunger is brought into action, and resilient means for absorbing excess movement of said vise actuating means after said vise means has clamped the wor 10. In a riveting machine, a cylinder, a

shape said 'ating means, a plunger work acted upon by said riveting plunger,

and movable jaws therefor engageable with said other lever means, said other sliding cam means adapted to wedge between said guide means and said other lever vmeans, and cause movement of said other lever means, so as to actuate said movable vise jaws, said vise jaw actuating means comprising said vise, cam and lever means constructed so as to bring said vise means into action before said riveting plunger is brought into action, said riveting plunger operating cam shaped so that the force delivered to said riveting plunger is increased as said plunger is brought into action, until when it is in actual engagement with a rivet, suflicient force is developed to enable said riveting plunger to rivet by a pressing action. In a riveting machine, a die, a plunger movable into engagement therewith, a vise means including a movable jaw, a jaw actuactuating means, a cam including a portion engageable with said jaw actuating means for causing a rapid initial movement thereof, and a portion engageable with said plunger operating means formed to cause a retarded movement of said day of. May, 1929. f FREDERICK n. ROHR. 

